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Light emitting device, display apparatus, and substrate

a technology of light emitting devices and display devices, which is applied in the direction of television systems, planar/plate-like light guides, instruments, etc., can solve the problems of increasing the surface temperature of the led substrate on which led chips are mounted, and achieve the effect of high luminance backlight without increasing electric power

Active Publication Date: 2019-08-08
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a light device that includes a light source, a light guide plate, and a substrate with electrical connections. The light guide plate emits the light received from the light source, and the substrate is bent to cover the space between the light source and the light receiving portion. The technical effect of this invention is a more efficient and compact light emitting device with improved lighting performance.

Problems solved by technology

However, increasing electric power for backlighting leads to a problem that the surface temperature of an LED substrate on which LED chips are mounted also increases.

Method used

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  • Light emitting device, display apparatus, and substrate
  • Light emitting device, display apparatus, and substrate
  • Light emitting device, display apparatus, and substrate

Examples

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first embodiment

Shapes of Display Apparatus and Light Emitting Device

[0023]FIG. 1 and FIG. 2 are perspective views schematically illustrating an example of external appearance of a display apparatus 1 according to the present disclosure. In FIG. 1, the display apparatus 1 is viewed from a point located diagonally above and in front of the display apparatus 1. In FIG. 2, the display apparatus 1 is viewed from a point located diagonally above and in rear of the display apparatus 1. FIGS. 1 and 2 illustrate an example in which the display apparatus 1 according to the present disclosure is applied to a liquid crystal television set. The display apparatus 1 is shaped such that a leg is attached to a housing 10 that is shaped substantially like a thin cuboid having a short dimension in a depth direction. A light emitting device 2 that displays images is installed in a front region of the housing 10.

[0024]The light emitting device 2 will be described in details below. FIG. 3 is a cross-sectional view sche...

second embodiment

[0043]The substrate 23 included in the light emitting device 2 according to the second embodiment has a different shape compared with that in the first embodiment. Note that in the description below, components similar to those described in the first embodiment are denoted by the reference symbols similar to those in the first embodiment, and further description will be omitted.

[0044]The light emitting device 2 installed in the display apparatus 1 according to the second embodiment is described below. FIG. 7 is a partially broken perspective view schematically illustrating an example of part of the light emitting device 2 according to the present disclosure. FIG. 7 illustrates part of the light emitting device 2 in a perspective view in which part of the structure is taken away so as to facilitate a better understanding of the internal configuration. When viewing FIG. 7, the front portion of the display apparatus 1 in which the light emitting device 2 is installed faces an upper lef...

third embodiment

[0048]The substrate 23 according to the third embodiment is formed into a bent shape by combining three flat pieces of substrate so as to define a space between the light sources 22 and the light receiving portion 240 as opposed to the substrate 23 according to the first embodiment, which is shaped from a single substrate. Figures illustrating the third embodiment are omitted.

[0049]As described in the first to third embodiments by way of examples, the substrate 23 of the light emitting device 2 that is built in the display apparatus 1 according to the present disclosure is bent so as to cover a space between the light sources 22 and the light receiving portion 240. This provides advantageous effects. For example, this can make the light emitting device 2 into a high luminance device. Moreover, in the light emitting device 2 built in the display apparatus 1 according to the present disclosure, the substrate 23 that is bent can be formed so as to increase the area of the substrate 23 ...

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Abstract

A light emitting device is installed in a display apparatus such as that used in a television set. The light emitting device includes a light source that emits light, a light guiding plate having a light receiving portion that receives light from the light source, and a substrate having a wiring pattern that is electrically connected to the light source. The substrate is bent and disposed so as to cover a space between the light source and the light receiving portion. The light guiding plate emits the received light toward, for example, a liquid crystal panel. The liquid crystal panel displays images by causing each of pixels to transmit or block light irradiated.

Description

BACKGROUND1. Field[0001]The present disclosure relates to a light emitting device, a display apparatus that uses the light emitting device, and a substrate to be used in the light emitting device.2. Description of the Related Art[0002]Liquid crystal display apparatuses, such as those included in liquid crystal television sets, have been widely used and various types of liquid crystal display apparatuses have been proposed.[0003]For example, Japanese Unexamined Patent Application Publication No. 2015-92235 discloses a liquid crystal display apparatus in which LED chips are disposed so as to oppose a side end of a light guiding plate, as illustrated in FIGS. 1 to 4, 7, 8, and 10.[0004]The liquid crystal display apparatus as described in Japanese Unexamined Patent Application Publication No. 2015-92235 uses a light emitting device that provides backlight and is expected to provide high luminance. One method of increasing the luminance of backlighting is to increase electric power for b...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F21V8/00H04N5/64
CPCG02B6/0088G02B6/0085G02B6/0055H04N5/64G02B6/0073G02B6/0068G02F1/133615G02B6/0086G02B6/0091G02B6/0083G02B6/0031G02F1/133
Inventor OKAWA, YUKIYOKOTA, MASASHI
Owner SHARP KK